Mix the chili powder, paprika, oregano, and ground cumin together in a large mixing bowl. Add the chicken broth, orange juice, and lime juice to your seasonings. Then set it aside.
Cut the pork roast into several small chuncks
Select the "Sauté" button on the Instant Pot. Coat the bottom of the pot with oil (about one tablespoon). Then place a few chunks of the roast in the pot and sear on each side. Set the seared meat aside into a separate pan. Repeat the process until all the meat has been seared. (NOTE: you will want to leave the lid off during the searing process)
Add about 2 tablespoons of oil to the Instant Pot. Stir in the chopped onion, jalapeno, and the chopped garlic. Stir occasionally until all the ingredients have softened.
Add the pork roast back into the Instant Pot. Pour in the broth mixture. Close the lid and ensure that the steam release handle is in the sealed position.
Select the "meat" button and set the timer to 30 minutes. When the time has expired, release the steam handle until all the steam has dissipated. Remove the lid.
Use tongs to remove the meat from the Instant Pot and place on a baking sheet. Use two forks to pull the meat apart. The meat should be very tender and juicy at this point.
